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Hydraulic control device

a control device and hydraulic technology, applied in the direction of gear lubrication/cooling, gearing elements, gearing, etc., can solve the problems of noise generation, the reduction of the discharging efficiency of the oil pump,

Active Publication Date: 2020-02-11
AISIN AW CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the hydraulic control device of Patent Document 1 is structured to return the oil drained from the pressure regulation valve during pressure regulation to the suction port of the oil pump as well as supply the oil to a location to be lubricated, the following problem occurs.
When air flows in the suction port of the oil pump, there is a possibility of the discharge efficiency of the oil pump decreasing and noise being generated.

Method used

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  • Hydraulic control device
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Embodiment Construction

[0043]Based on the above description, the hydraulic control device according to the disclosure preferably includes the following structures.

[0044]The hydraulic control device (1) which controls hydraulic pressure supplied to the automatic transmission device (9) provided with the fluid coupling (92) that has the lockup clutch (93), the hydraulic control device (1) including: the pressure regulation valve (20) that regulates a hydraulic pressure oil supplied from the oil pump (P1) and supplies the oil to the fluid coupling (92); the discharge oil passage (76) through which oil discharged from the fluid coupling (92) flows when the lockup clutch (93) is disengaged; the lubrication oil passage (78) that supplies oil from the discharge oil passage (76) to the location to be lubricated (L) in the automatic transmission device (9); the return oil passage (75) that returns oil drained from the pressure regulation valve (20) during pressure regulation to the suction port (Pb) of the oil pum...

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Abstract

A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a hydraulic control device.BACKGROUND ART[0002]An automatic transmission device provided with a fluid coupling that has a lockup clutch is used. Regarding the above automatic transmission device, for example, Japanese Patent Application Publication No. 2016-8687 (JP 2016-8687 A) (Patent Document 1) discloses a technique of switching a path for supplying hydraulic pressure regulated by a pressure regulation valve (secondary regulation valve 66) to the fluid coupling (torque converter 7) so as to control a state (engagement / disengagement) of the lockup clutch (lockup clutch 7a) using a hydraulic control device. Patent Document 1 also discloses a technique of supplying oil discharged from the fluid coupling to a location to be lubricated (lubrication system 69) via a lubrication oil passage (lubrication oil passage 63j) when the lockup clutch is disengaged. Additionally, Patent Document 1 discloses a technique of returning the oil ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F16H61/00F16H61/14F16H61/4061F16H57/04F16H61/662F16H59/72F16H61/686F16H61/02F16H59/38
CPCF16H59/72F16H61/66272F16H61/0025F16H61/0009F16H61/142F16H2059/385F16H61/0206F16H2061/0037F16H61/686
Inventor TSUCHIDA, KENICHIHAYASHI, TOSHIAKIKIMURA, YOICHIROMORIYAMA, SYUJISOGA, YOSHINOBUNITANI, HIROMITSUINAGAKI, TAKAFUMIYAMAMOTO, TETSUYA
Owner AISIN AW CO LTD